Pull-out guide for guiding a drawer, and item of furniture having a pull-out guide

ABSTRACT

A pull-out guide for guiding a drawer, having a cabinet rail for attaching to a furniture cabinet, and a drawer rail for attaching to a drawer, wherein a roller carriage is provided between the rails, the rollers of which during mutually relative movement of the rails roll on a guide face of the respective rail, and which roller carriage moves along these rails. In an extended state of the drawer rail, the roller carriage is positioned at the drawer-rail side end on the cabinet rail which lies therebelow. The roller carriage has a projecting support portion for supporting the drawer rail on the cabinet rail, which support portion in a completely extended state of the drawer rail is positioned in a region which lies outside a guide face on the cabinet rail, on which the rollers of the roller carriage roll and may move to the maximum extent.

This application claims the benefit under 35 USC §119(a)-(d) of GermanApplication No. 20 2014 103 864.7 filed Aug. 20, 2014, the entirety ofwhich is incorporated herein by reference.

FIELD OF THE INVENTION

The invention relates to a pull-out guide for guiding a drawer and to anitem of furniture having such a pull-out guide.

BACKGROUND OF THE INVENTION

Pull-out guides for guiding a drawer have already become known in manyembodiments as a full-extension pull-out with cabinet rail, centralrail, and drawer rail, and as a partial or simple pull-out with cabinetrail and drawer rail. One application relates to base-mounted guides,for example, in which the pull-out guides are attached below a drawerbase of a drawer which is made of wood, for example. Nevertheless, apull-out which extends as far as possible is desired in particular inthe case of partial pull-outs which are composed of a cabinet rail andof a drawer rail. Mounting means have to be correspondingly adaptedthereto. The load which is envisaged for the drawer and to which themounting means, for example a roller carriage between the rails, isexposed here represents one limitation for the mounting means.

SUMMARY OF THE INVENTION

The invention is based on the object of providing a pull-out guide whichis optimized in particular in terms of pull-out functionality.

The invention proceeds from a pull-out guide for guiding a drawer,having a cabinet rail for attaching to a furniture cabinet, and a drawerrail for attaching a drawer, wherein a roller carriage is providedbetween the rails, the rollers of which roller carriage during mutuallyrelative movement of the rails roll on a guide face of the respectiverail, and which roller carriage hereby moves along these rails, andwherein in an extended state of the drawer rail the roller carriage ispositioned at the drawer-rail side end on the cabinet rail which liestherebelow.

The core of the present invention now lies in that the roller carriagehas a projecting support portion for supporting the drawer rail on thecabinet rail, which support portion in a completely extended state ofthe drawer is positioned in a region which lies outside a guide face onthe cabinet rail, on which the rollers of the roller carriage roll andmay move to the maximum extent.

On account of this approach, a roller carriage which indeed has aneffective support length which includes the projecting support portion,but with a view to a position at the drawer-rail side end of the cabinetrail lying therebelow is displaceable so far in the direction of thedrawer rail as if the projecting support portion were nonexistent, isachieved. Accordingly, as compared to a state in which a conventionalroller carriage having the same length is provided, the drawer railhaving the roller carriage disposed therebelow may be farther displacedin the direction of the forward end of the cabinet rail.

Moreover, a further advantageous aspect may lie in that the effectivesupport length for the drawer rail even in the fully extended stateincludes the projecting support portion, when the latter is accordinglyconceived so as to be load bearing. Support of the rail lying thereabovein the case of conventional roller carriages is only provided until theend of the guide face lying therebelow, on which rollers of the rollercarriage roll, has been reached.

The present invention furthermore proceeds from a pull-out guide forguiding a drawer, having a cabinet rail for attaching to a furniturecabinet, and a drawer rail for attaching a drawer, and a central railbetween the drawer rail and the cabinet rail, wherein a roller carriageis provided between the drawer rail and the central rail, the rollers ofwhich roller carriage during mutually relative movement of the drawerrail and the central rail roll on a guide face of the respective railand hereby moves along these rails, and wherein in an extended state ofthe drawer rail the roller carriage is positioned at the drawer-railside end on the central rail which lies therebelow. The substantialaspect now lies in that the roller carriage has a projecting supportportion for supporting the drawer rail on the central rail, whichsupport portion in a completely extended state of the drawer rail ispositioned in a region which lies outside a guide face on the centralrail, on which rollers of the roller carriage roll and may move to themaximum extent.

On account of this measure, the advantages which are discussed abovewith reference to the cabinet rail and the drawer rail may be utilizedin the present case between the drawer rail and the central rail. Thismeans, in particular, a comparatively long roller carriage which,however, with a view to the maximum extendibility of the rails inrelation to one another, is only limiting in terms of a length whichcorresponds to the length of the roller carriage minus the projectingsupport portion.

In a third case, the roller carriage according to the invention isprovided in a pull-out, having a cabinet rail, a central rail, and adrawer rail between the central rail and the cabinet rail, such that theadvantages which have just been discussed arise in a correspondingmanner when a roller carriage according to the present invention isemployed between the cabinet rail and the central rail.

The core of the present invention here lies in that the roller carriagehas a projecting support portion for supporting the central rail on thecabinet rail, which support portion in a completely extended state ofthe central rail is positioned in a region which lies outside a guideface on the cabinet rail, on which the rollers of the roller carriageroll and may move to the maximum extent.

Preferably, the projecting support portion supports the rail which isdisposed thereon in a region which is outside a guide face of the railwhich is disposed therebelow, on which the rollers of the rollercarriage roll and may move to the maximum extent, when the rail is fullyextended.

In a further preferred design embodiment of the invention, theprojecting support portion comprises one or a plurality of supportrollers.

In this way, the non-projecting portion of the roller carriage havingsupport rollers may be lengthened in a quasi seamless manner by thesupport portion. In a state in which the support rollers are mountedbetween guide faces of the rails, the roller carriage thus acts like aconventional roller carriage which has a length which corresponds to thelength of the roller carriage according to the present invention, havinga projecting support portion. However, for maximum displaceability ofthe roller carriage to an end of a rail, for example of the cabinet railor of the central rail, on the side on which the projecting supportportion is located, only such a length which has been reduced by theprojecting support portion is of importance, on account of which ahigher extendibility of the rails overall results.

In a further advantageous design embodiment of the present invention,the projecting support portion protrudes beyond a lateral guide regionof the roller carriage, which laterally encompasses a rail on which theroller carriage is mounted. Depending on the design embodiment, oppositelateral guide regions which are protruded may also be provided.

The projecting support portion which protrudes in a balcony-type manneris thus fixed in relation to the lateral support region which normallycannot depart from the end of a guide face or of a rail, respectively,on which the lateral support region moves. According to the invention,this does not apply to the projecting support portion.

Moreover, it is advantageous for the projecting support portion to beadded on to a roller-carriage part having a lateral guide region.

It is even conceivable for a conventional roller carriage to be able tobe retrofitted in this way with a support portion projecting in abalcony-type manner or for the roller carriage to be employed in theconventional way without the support portion, respectively.

Moreover, it is preferable for the roller carriage to be a caged rollercarriage having rollers on a primary side and rollers on at least onelateral guide region which laterally encompass a rail on which theroller carriage is mounted. On account of also lateral rollers, a cagedroller carriage of this type has laterally stabilizing runningcharacteristics in a pull-out guide.

In a further preferred design embodiment of the invention, theprojecting support portion protrudes by more than 30% beyond a part ofthe roller carriage which has a lateral guide region.

In this way, the conventional support length of the roller carriage islengthened by approx. 30%, in particular between two guide faces ofrails. It is also conceivable for an even larger protrusion, whichcorresponds to 50, 60, 70, 80% of the length of the remaining rollercarriage having laterally opposed guide regions, to be implemented.

Moreover, it is favorable for the rail on which the roller carriage isdisplaceably mounted to have a stop for a roller carriage, which enablesthe projecting support portion to pass through. On account thereof, itis avoided that the roller carriage at the end of the rail on which theroller carriage runs is stopped already when the roller carriage reachesa leading edge of the projecting support portion and thus no furtherdisplacement of the roller carriage, and thus no “shortening” of theroller carriage with a view to maximum displaceability of the rail whichis mounted on the roller carriage to a rail end, is ensured.

It is furthermore advantageous for the rail of the pull-out guide whichis displaceably mounted on a roller carriage which is disposedtherebelow to be capable of being extended to a maximum pull-outposition in which an inboard end, in relation to an assembly on afurniture cabinet, is displaceable up to or at least almost up to theinboard end of the roller carriage in the maximum stop position of thelatter, until this rail stops at a stop.

In this way, almost a full-extension pull-out may be implemented. Theextension length is approximately the length of the drawer rail which islocated on the roller carriage minus the region of the roller carriagewhich has a lateral guide region on the rail lying therebelow.

The support portion which projects in a balcony-type manner and whichmay be utilized for mounting the rails in this context is therefore notof importance.

BRIEF DESCRIPTION OF THE DRAWINGS

A plurality of exemplary embodiments will be explained in more detail inthe following by means of the drawings, while stating further advantagesand details.

FIG. 1 shows a simple pull-out in a perspective illustration;

FIG. 2 shows a side view of the simple pull-out from FIG. 1, from a sidewhich is not visible in FIG. 1;

FIG. 3 shows an alternative design embodiment of a forward end portionof the pull-out guide as per FIG. 2;

FIG. 4 shows an enlarged illustration of the rearward end portion of thepull-out guide as per FIG. 1 or FIG. 2, respectively, from the sidewhich is visible in FIG. 1;

FIG. 5 shows a perspective illustration of a detail of the pull-outguide as per FIG. 1, with the drawer rail removed, from an oppositeviewpoint in relation to the one of the illustration of FIG. 1, having avisible roller carriage;

FIG. 6 shows an illustration corresponding to FIG. 5, in which theroller carriage has been displaced to the forward end of the cabinetrail in relation to an installed state, likewise without the drawerrail;

FIG. 7 shows a furniture cabinet having a drawer without a front panelassembled therein, on a pull-out guide according to the invention(left-hand side) and a conventional pull-out guide (right-hand side), ina front view;

FIGS. 8 a and 8 b show in each case enlarged sectional views of thesections A-A (FIG. 8 a) and B-B (FIG. 8 a) which are indicated in FIG.7; and

FIG. 9 shows a pull-out guide according to the invention, which has beeninserted into a furniture cabinet, in a perspective illustration fromobliquely above.

DETAILED DESCRIPTION OF THE INVENTION

A simple pull-out 1 having a cabinet rail 2 and a drawer rail 3 isillustrated in FIG. 1. A 90° angular deflection 6 and an opening 7 forintroducing a fixing screw, for attaching to a cabinet traverse 5 (seeFIG. 8) so as to bear on the cabinet traverse 5, are provided at aforward end of the cabinet rail 2. By means of the fixing screw, thesimple pull-out 1 may also be used in a vertical orientation.

A receptacle hook 8 for the rearward end of a drawer (not illustrated)and a front latching block 9 for latching on a drawer (not illustrated)are provided on the drawer rail 3.

An assembly slot 11 for lateral adjustment of the simple pull-out 1 isin the rearward region 10 of the cabinet rail 2.

Moreover, an automatic retraction element 12, which is composed of adamper 13 and a spring unit 14, is assembled on the cabinet rail 2, soas to enable damped retraction of the drawer rail 3 to the fullyretracted state.

In FIG. 2, the cabinet rail 2, the drawer rail 3, having a frontlatching unit 9 and a receptacle hook 8, are illustrated in a truncatedmanner in a side view which is opposed to that of the viewpoint ofFIG. 1. Moreover, rollers 15, 16 for bearing the load on the drawer rail3 are visible.

The roller 15 is rotatably mounted on the cabinet rail 2 in a forwardend region 4 a (see FIG. 3 or FIG. 6, for example).

The front latching block 9 having the additional configuration of a stopfunctionality for delimiting the maximum retracted drawer position isillustrated in FIG. 3. To this end, a stop cam 9 a is configured on thefront latching block 9, and a stop web 17 is configured on the cabinetrail 2.

Additionally or alternatively, a stop in relation to the cabinet rail 2may be implemented on the drawer rail 3, as is shown in FIG. 4. To thisend, a stop block 18 which interacts with a shock- and noise-mitigatingelement, for example a rubber element 19 which is assembled on thedrawer rail 3, is provided on the cabinet rail 2.

In FIG. 5, the cabinet rail 2 is illustrated with the drawer rail 3having been removed, such that from a viewpoint according to FIG. 2 in aperspective illustration from obliquely above, a roller carriage 20which by way of rollers 21, 22 rolls on a guide face 2 a of the cabinetrail 2 is visible.

Moreover, rollers 23 which roll on a lateral guide face of the drawerrail (not illustrated), so as to laterally stabilize the drawer rail,are provided in a laterally encompassing portion 24 of the rollercarriage 20.

The rollers 22 are mounted in a projecting support portion of the rollercarriage 20, which projecting support portion protrudes in abalcony-type manner beyond that part of the roller carriage 20 that hasthe laterally encompassing portion 24. Depending on the length of thesimple pull-out 1, the complete length of the roller carriage 20,including the projecting support portion 25 having its rollers 22 formounting the drawer rail 3 which is disposed thereupon, may be utilizedwhen the rollers 21, 22 roll on the guide face 2 a. The roller carriagethus has the function of a roller carriage having presently ten rollerswith a comparatively large support length.

According to the invention, the full roller count may be utilized acrossmore than, for example, 80% of the length of the guide face 2 forsupporting the drawer rail which is mounted thereupon.

If the drawer rail is fully extended, with a corresponding displacementof the roller carriage 20 to the forward end 4 of the cabinet rail 2,the maximum pull-out position is terminated once the roller carriage 20at the end of the cabinet rail 2 stops at a stop 26 (see FIG. 6) and,moreover, the drawer rail by way of its rearward end contacts the end 20a or a corresponding end region on the roller carriage 20. On account ofthe projecting support portion 25, stopping does not already take placeat the rollers 22, but only once the projecting support portion 25 haspassed the stop 26 and makes its way into the region of the rollercarriage, in which the laterally encompassing portion 24 is configured.On account thereof, a drawer rail can be extended comparatively fartherin relation to the cabinet rail 2, despite a comparatively large rollercarriage having more than six rollers, for example ten rollers, beingavailable when rolling on the guide face 2 a for support across asubstantial region of the rail length.

Moreover, in the fully extended state according to FIG. 6, theprojecting support portion 25 in the region which protrudes in abalcony-type manner can support the drawer rail in a region wheresupport of the rail lying thereabove normally is not available, sincethe end of the guide face lying therebelow, on which rollers of a rollercarriage roll, has been reached.

On account of this measure, a drawer rail having a drawer disposedthereon can not only be farther extended, but there is also thepotential for the simple pull-out with an at least identical pull-outlength to be assembled on the drawer in a slightly recessed manner, suchthat a front wall 27 or a correspondingly encircling frame does not haveto be notched.

On account thereof, the fundamental structure of a drawer 28 (see FIG.7) is not weakened. Moreover, a modest labor effort is required, sinceno clearances have to be provided. This situation will be explained inmore detail in FIGS. 7, 8 a, and 8 b.

A cabinet 29 (see also FIG. 9 in this respect) having a drawer 28 with afront wall 27, which is assembled therein, is illustrated in FIG. 7.

In the left part of the picture, a simple pull-out 1 according to theinvention is assembled under a drawer base, whereas in the right part ofthe picture, the attachment of a conventional pull-out is visualized ina schematically indicated manner.

As can be seen already in FIG. 7, the front wall 27 has to be notched inorder for the conventional pull-out to be attached, so that the pull-outis capable of being assembled as far as possible toward the forward endof the drawer 28, in order to obtain the pull-out length which has beencorrespondingly predefined.

In the simple pull-out 1 which is constructed according to theinvention, a corresponding notch or clearance 30, respectively, as inthe conventional pull-out (see FIG. 7 right-hand side, or sectional viewFIG. 8 b, respectively), is not required.

This is because at a comparable length of a roller carriage between thecabinet rail 2 and the drawer rail 3, the roller carriage 20 accordingto the invention may be farther displaced through the projecting supportportion 25 toward the forward end of the cabinet rail, this enabling thedrawer rail to be correspondingly farther extended. The addeddisplacement corresponds to approximately the length of the projectingsupport portion. On account thereof, not only can a clearance be saved,but additional pull-out length may optionally be obtained.

It can be seen in the sectional view of FIG. 8 a that the simplepull-out 1 merely contacts the front wall 27, whereas for at leastcomparable functionality the clearance 30 is required in a conventionalpull-out in FIG. 7.

LIST OF REFERENCE SIGNS

-   1 Simple pull-out-   2 Cabinet rail-   2 a Guide face-   3 Drawer rail-   4 Forward end-   4 a Forward end region-   5 Cabinet traverse-   6 90° angular deflection-   7 Opening-   8 Receptacle hook-   9 Front latching block-   9 a Stop cam-   10 Rearward region-   11 Assembly slot-   12 Automatic retraction element-   13 Damper-   14 Spring unit-   15 Rollers-   16 Rollers-   17 Stop web-   18 Stop block-   19 Rubber element-   20 Roller carriage-   20 a End of roller carriage-   21 Rollers-   22 Rollers-   23 Rollers-   24 Laterally encompassing portion-   25 Projecting support portion-   26 Stop-   27 Front wall-   28 Drawer-   29 Cabinet-   30 Clearance

1. A pull-out guide for guiding a drawer, having a cabinet rail for attaching to a furniture cabinet, and a drawer rail for attaching to a drawer, wherein a roller carriage is provided between the rails, the rollers of which roller carriage during mutually relative movement of the rails roll on a guide face of the respective rail, which roller carriage hereby moves along these rails, and wherein in an extended state of the drawer rail the roller carriage is positioned at the drawer-rail side end on the cabinet rail which lies therebelow, and wherein the roller carriage has a projecting support portion for supporting the drawer rail on the cabinet rail, which support portion in a completely extended state of the drawer rail is positioned in a region which lies outside a guide face on the cabinet rail, on which the rollers of the roller carriage roll and may move to the maximum extent.
 2. A pull-out guide for guiding a drawer, having a cabinet rail for attaching to a furniture cabinet, and a drawer rail for attaching to a drawer, and a central rail between the drawer rail and the cabinet rail, wherein a roller carriage is provided between the drawer rail and the central rail, the rollers of which roller carriage during mutually relative movement of the drawer rail and the central rail roll on a guide face of the respective rail, and which roller carriage hereby moves along these rails, wherein in an extended state of the drawer rail the roller carriage is positioned at the drawer-rail side end on the central rail which lies therebelow, and wherein the roller carriage has a projecting support portion for supporting the drawer rail on the central rail, which support portion in a completely extended state of the drawer rail is positioned in a region which lies outside a guide face on the central rail, on which rollers of the roller carriage roll and may move to the maximum extent.
 3. A pull-out guide for guiding a drawer, having a cabinet rail for attaching to a furniture cabinet, and a drawer rail for attaching to a drawer, and a central rail between the drawer rail and the cabinet rail, wherein a roller carriage is provided between the central rail and the cabinet rail, the rollers of which roller carriage during mutually relative movement of the central rail and the cabinet rail roll on a guide face of the respective rail, and which roller carriage hereby moves along these rails, wherein in an extended state of the central rail the roller carriage is positioned at the central-rail side end on the cabinet rail which lies therebelow, and wherein the roller carriage has a projecting support portion for supporting the central rail on the cabinet rail, which support portion in a completely extended state of the central rail is positioned in a region which lies outside a guide face on the cabinet rail, on which the rollers of the roller carriage roll and may move to the maximum extent.
 4. The pull-out guide according claim 1, wherein the projecting support portion has one or a plurality of support rollers.
 5. The pull-out guide according to claim 1, wherein the projecting support portion protrudes in a balcony-type manner beyond a lateral guide region of the roller carriage, which laterally encompasses a rail on which the roller carriage is mounted.
 6. The pull-out guide according to claim 1, wherein the projecting support portion is added on to a roller-carriage part having a lateral guide region.
 7. The pull-out guide according to claim 1, wherein the roller carriage is a caged roller carriage having rollers on a primary side and rollers on a lateral guide region which laterally encompasses a rail on which the roller carriage is mounted.
 8. The pull-out guide according to claim 1, wherein the projecting support portion protrudes by more than 30% beyond a part of the roller carriage which has a lateral guide region.
 9. The pull-out guide according to claim 1, wherein the rail on which the roller carriage is displaceably mounted has a stop for the roller carriage, which enables the projecting support portion to pass through.
 10. The pull-out guide according to claim 1, wherein the rail of the pull-out guide which is displaceably mounted on a roller carriage which is disposed therebelow is capable of being extended to a maximum pull-out position in which an inboard end, in relation to an assembly on a furniture cabinet, is displaceable up to or at least almost up to the inboard end of the roller carriage in the maximum stop position of the latter, until this rail stops at a stop.
 11. An item of furniture having a pull-out guide according to claim
 1. 12. The pull-out guide according claim 2, wherein the projecting support portion has one or a plurality of support rollers.
 13. The pull-out guide according to claim 2, wherein the projecting support portion protrudes in a balcony-type manner beyond a lateral guide region of the roller carriage, which laterally encompasses a rail on which the roller carriage is mounted.
 14. The pull-out guide according to claim 2, wherein the projecting support portion is added on to a roller-carriage part having a lateral guide region.
 15. The pull-out guide according to claim 2, wherein the roller carriage is a caged roller carriage having rollers on a primary side and rollers on a lateral guide region which laterally encompasses a rail on which the roller carriage is mounted.
 16. The pull-out guide according to claim 2, wherein the projecting support portion protrudes by more than 30% beyond a part of the roller carriage which has a lateral guide region.
 17. The pull-out guide according to claim 2, wherein the rail on which the roller carriage is displaceably mounted has a stop for the roller carriage, which enables the projecting support portion to pass through.
 18. The pull-out guide according to claim 2, wherein the rail of the pull-out guide which is displaceably mounted on a roller carriage which is disposed therebelow is capable of being extended to a maximum pull-out position in which an inboard end, in relation to an assembly on a furniture cabinet, is displaceable up to or at least almost up to the inboard end of the roller carriage in the maximum stop position of the latter, until this rail stops at a stop.
 19. An item of furniture having a pull-out guide according to claim
 2. 20. The pull-out guide according claim 3, wherein the projecting support portion has one or a plurality of support rollers.
 21. The pull-out guide according to claim 3, wherein the projecting support portion protrudes in a balcony-type manner beyond a lateral guide region of the roller carriage, which laterally encompasses a rail on which the roller carriage is mounted.
 22. The pull-out guide according to claim 3, wherein the projecting support portion is added on to a roller-carriage part having a lateral guide region.
 23. The pull-out guide according to claim 3, wherein the roller carriage is a caged roller carriage having rollers on a primary side and rollers on a lateral guide region which laterally encompasses a rail on which the roller carriage is mounted.
 24. The pull-out guide according to claim 3, wherein the projecting support portion protrudes by more than 30% beyond a part of the roller carriage which has a lateral guide region.
 25. The pull-out guide according to claim 3, wherein the rail on which the roller carriage is displaceably mounted has a stop for the roller carriage, which enables the projecting support portion to pass through.
 26. The pull-out guide according to claim 3, wherein the rail of the pull-out guide which is displaceably mounted on a roller carriage which is disposed therebelow is capable of being extended to a maximum pull-out position in which an inboard end, in relation to an assembly on a furniture cabinet, is displaceable up to or at least almost up to the inboard end of the roller carriage in the maximum stop position of the latter, until this rail stops at a stop.
 27. An item of furniture having a pull-out guide according to claim
 3. 